1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
scoundrel [369]
3 years ago
10

1. 3x + y = 11 5x - y = 21

Mathematics
1 answer:
sergeinik [125]3 years ago
4 0

Answer:

[4, -1]

Step-by-step explanation:

Using the Elimination Method:

3x + y = 11

5x - y = 21

__________

8x = 32

__ ___

8 8

x = 4 [Plug this back into both equations to get the y-coordinate of -1]; -1 = y

The <em>y</em>'s are already <em>additive</em><em> </em><em>inverses</em><em> </em>[result in 0], canceling each other out.

I am joyous to assist you anytime.

You might be interested in
A line contains the points (−26, −37)(−26, −37) and (−32, −61)(−32, −61) . What is the slope of the line in simplified form?
Rus_ich [418]
Slope = (y2 - y1)/(x2 - x1) = (-61 - (-37))/(-32 - (-26)) = (-61 + 37)/(-32 + 26) = -24/-6 = 4

Therefore, slope = 4
3 0
3 years ago
An expression which combines variables, numbers, and at least one operation.
sveta [45]
An expression which combines variables, numbers and at least one operation is called binomial. Binomial consists of two terms that is separated with at least one operation. Operations may include addition, subtraction, multiplication and division.
7 0
3 years ago
Which expression below represents,”A number increased by five?”
Anna35 [415]
C
The word “increased” means to add, so C would be the correct answer. Hope this helps!
8 0
3 years ago
Read 2 more answers
In a survey of 500 people, 31% said they were afraid of flying. What decimal represents the number of people who said they were
Elden [556K]

Answer:

.31

Step-by-step explanation:

155 / 5        31/100

500/ 5

31÷100

Long Division for 31 divided by 100

round to a Max of 3 Decimal gives us

=0.31

6 0
3 years ago
Need Help fast, with steps
Hitman42 [59]

Answer:The solution is in the attached file below

Step-by-step explanation:

5 0
3 years ago
Other questions:
  • Help plz thankssssss
    8·1 answer
  • Identify the cross section of the solid shown in the diagram
    13·1 answer
  • Jessie and Nathan went out to eat. Their lunch cost $17.98. If they give the waitress a 17% tip, how much was their total cost?
    14·1 answer
  • If you take 3 by 2 what do you get
    10·1 answer
  • PLZ HELP! Pre Calculus!
    5·1 answer
  • Identify the independent and dependent variables for this study. The independent variable is the ratio of students to faculty us
    15·1 answer
  • Grandfath
    9·1 answer
  • To participate in a competition, each team must follow the rules about the allowable number of adults and children on a team.
    6·1 answer
  • Please help I’ll give Brainly please
    10·2 answers
  • Chocolate costing $\$10$ per pound is mixed with nuts costing $\$4$ per pound to make a mixture costing $\$6$ per pound. What fr
    7·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!